public class 数组所有元素总和和最大值 {
    public static void main(String[] args){
        int[] arr3={1, 2, 3};
        int sum =0;
        for (int i = 0;i<arr3.length;i++){
            sum += arr3[i];
        }
        System.out.println("数组所有元素的和:" + sum);
        int max =arr3[0];
        for (int i = 1; i<arr3.length;i++){
            if (arr3[i]>max){
                max = arr3[i];

            }
        }
        System.out.println("数组最大值："+max);
    }
}
